Nad Classic 512 User manual

—

SERVICE

SAFETY

PRECAUTIONS

(UL)

1.

Use

exact

replacement

parts

for

critical

locations

marked

“

/J\

7

2.

Return

lead

dress

to

original

position

and

re-install

protective

covers.

3.

Before

returning

to

customer,

test

for

shock

hazard;

use

either

mothod

A

or

B:

ICE

MANU,

A.

Leakage

test

“cold”:

1.

Unplug

the

AC

cord;

turn

power

switch

ON.

2.

Connect

one

lead

of

High

Voltage

Insulation

Tester

to

both

prongs

of

the

AC

plug.

3.

Touch

other

lead

to

all

exposed

metal

parts.

4,

Impedance

measurement

must

be

0.3-5.0

Megohms.

B.

Leakage

test,

“live”

:

1.

Plug

unit

directly

into

the

AC

outlet:

do

not

use

isolation

transformer.

2.

Connect

one

lead

of

the

Leakage

Current

Tester

to

earth

ground.

3.

Touch

other

lead

to

all

exposed

metal

parts.

COMPACT

DISC

PLAYER

SER

on

or—

|

Lo

ou

a

o

=o

O02

(Oa)

SAFETY

INFORMATION

CAUTION

.-

INVISIBLE

LASER

RADIATION

WHEN

OPEN

AND

INTERLOCKS

DEFEATED.

AVOID

EXPOSURE

TO

BEAM.

ADVARSEL

-

USYNLIG

LASERSTRALING

NAR

DEKSEL

APNES

OG

SIKKERHEDSLAS

BRYTES.

UNNGA

EKSPONERING

FOR

STRALEN.

ADVARSEL

-

USYNLIG

LASERSTRALING

VED

ABNING,

NAR

SIKKERHEDSAFBRYDERE

ER

UDE

AF

FUNKTION.

UNDGA

UDSATTELSE

FOR

STRALING.

VARING

-

OSYNLING

LASERSTRALNING

NAR

DENNA

DEL

AR

OPPNAD

OCH

SPARRAR

AR

URKOPPLADE.

STRALEN

AR

FARLIG.

VARO!

-

AVATTAESSA

JA

SUOJALUKITUS

OHITETTAESSA

OLET

ALTTINA

NAKTMATONTA

LASERSATEILYLLE.

ALA

KAISO

SATEESEEN.

VORSICT!

-

UNSICHTBARE

LASERTRAHLUNG

TRITT

AUS,

WENN

DECKEL

GEOFFNET

UND

WENN

SICHERHEITSVERRIEGELUNG

UBERBRUCKT

IST.

NICHT

DEM

STRAHL

AUSSETZEN.

CLASS

j

LASER

PRODUCT

The

lightning

flash

with

arrowhead,

within

an

equilateral

tri-

The

exclamation

point

within

an

equilateral

triangle

is

intend-

angle

is

intended

to

alert

the

user

of

the

presence

of

ed

to

alert

the

user

of

the

presence

of

important

operating

uninsulated

"dangerous

voltage"

within

the

product's

and

maintenance

(servicing)

instructions

in

the

literature

enclosure;

that

may

be

of

sufficient

magnitude

to

consti-

accompanying

the

appliance.

tute

a

risk

of

electric

shock

to

persons.

THIS

DEVICE

COMPLIES

WITH

PART

15

OF

THE FCC

RULES.

OPERATION

IS

SUBJECT

TO

THE

FOLLOWING

TWO

CONDITIONS

:-

(1)

THIS

DEVICE

MAY

NOT

CAUSE

HARMFUL

INTERFERENCE,

AND

(2)

THIS

DEVICE

MUST

ACCEPT

ANY

INTERFERENCE

RECIVED,

INCLUDING

INTERFERENCE

THAT

MAY

CAUSE

UNDESIRED

OPERATION.

7

CONTENTS

DESCRIPTION

PAGE

SPECIFICATIONS:

si

cesiccatadecstcaspasyausgeeh

nctiee

wes

5e

ag

ce

gelasaweitnas-aaeus

ta

raamg

naa

ddebeddagniaea

nraiebopnanteaeueniae

4

REAR:

PANEL?

FRONT

PANEL

VIEW

siicias

uct

anomie

ednesinctexeneasadie

Ga ar

cacuren

nurs

ane

5

BOCK

DIAG

EAD

iiaslesia

duc

exiaute

copsetere

buak

a

ae

cay

Saananug

sa

vieiilneesealacearnia

vain

aeaniiney

tatalaahan

eatin

ieiad

taaiamenae

6

VEN

Ce

TAG

oc

occe

dctsin

So

sbeet

tcealagnmsesisa

utess

od

ed

vag

lenses

spe

qu

dusstaa

phaiavnedatanteusuauaaesnennera

sat

doaaieudnecie

ri

DISASSEMBLY

INS

TRUCTIONS

4

itsnkea

ieneoa

nese

ncaa

ee

8

ADIGNMENT

PROCEDURE,

sisieicsetacaespenstrsdeaeuraiccantsg

nasntateapeatancuen

ned

lecumn

eaeieuatanscii

ssa

tuaus

pense

9-11

GUIDANCE

ON

FOCUS

AND

TRACKING

GAIN

ADJUSTMENT

...........::cecescsecerssessessseasseaeeenes

12

IM

PORTANT

NO

PES

ss

scncetesnSocrsnabeaaras

dues

wusscien

cri

sdnaceh

ctapaisieatoerpoveuselacdvagaasuvagaan

aes

betacatesaneagedaaes

13

-14

POBLAVOUT

(PARTS.

SIDE):

ocsssastociesecianckaciseatiNlanenevnelwteierenste

ardamrtiannucatecni

aime

1316

SCHEMATIC

DIAGRAM

swinsiy

Siscdunn

ros

tanientsssiadcesstecentaiteah

nos

vaesd

ease

tenoadstnsedsaninesseguan

anpanmanteasaracsiisdes

10718

IG

BLOCK

DIAGHAM

siceviccutcs

unasalon

tab

iieclne

taharaecupeaeseusies

uneatuaauie

ia

aacaataaiatntditagunly

elasccdaisbenecainte

19

-21

TROUBLESHOOTING:

GUIDE

co.

c.saeast.atun

sates

wticannausberouaiienesudstuneta

de

avadoGaaaatiatgel

usagi

ssvesiaadhcusaueccianeatial

22

EXPLODED

VIEW

cts,

iitesacateselosei.Geinerastuelsqade

cipluntinuctharks

esbantenupoieaas

aleve

deeduugandt

buleutenvatvaalatteneancs

23

EXPLODED:

VIEW

PARTS

UIST

icc

sciccnstesasnvinedautisaduen

ea

ciusasatecatinantsaanusiiran

diem

ectsaesselapnediedesiiriiaes

24

MECHANISM

EXPLODED

VIEW

een

earner

ron

era

ich

SraakestSeastiss

25

-27

BLECTRIGAL

PARAS

LIST

cccadeduccachcosstesientan

iamicouet

ceauiywaiaiaias

Shakin

nincon

nna

teuteebagnaadvieteange

28

-30

PACKING:

DIAGHAIWE

ssc:

chticninnaidarcetniacSeaie

cod

iuldscdatsincitvtieatemeavautinadac

iar

etieey

cadens

idvaeuneatigvedmendeces

31

SPECIFICATIONS

DIS

Cae

CIN

ssese

eh

wai

erate

bcctmataetetns

Matera

etnies

One

Disc,

120

or

80

mm

Programming

Capacity

.............:

spate

ab

ezesktec

skins

21

Tracks

Decoding

...........

begieadce

Leta

es

sch

uesenmenced

esters

eataenereutdecasne

MASH

1-bit

converter

DI

GItEL

FIER

faiipcescsiadtesaniyaanaoayiecsvotueieiaseveoseenndeer

eons

4

Times

oversample

Linear

phase

with

18

bit

coefficients

POG

FINS

R

ecweceicca

ig

tinted

ewevianieieideeodasecesreinaniatadedest

5

pole

active

FIOQUENCY

RESPONSE

sist

cwcnensisseeatieeasnoteceesianesdaniens

5

Hz

-

20

kHz

+0.5

dB

Des

Emphasis

ror

ccs

tis

neisunansuy

Aveeesermccre

tataeieeee

+0.3

dB

TAD

(et

OB.

A

KEIZ)

avg

ee

eancasaminn

0.0025%

Intermodulation

Distortion

0...

eee

eetcceeeeessteeeeeeees

<

-100

dB

(19

+

20

kHz)

DYNEMIC

RANGE

sihsscrssiiensreeusess

ecmeceedsnmnedeivarenvedininos

98

dB

LIMB

AIWY

shcisacieicetnenrtettntinasadenenatemens

annua

daa

+0.5

dB,

0

dB

to

-90

dB

Signal

/

Noise

Ratio

(A-Weighted)

«0.00...

ee

105

dB,

De-Emphasis

on

108

dB,

De-Emphasis

off

Channel

Separation

1

KHZ

oo...

eee

eeeeseeenerteeees

>

100

dB

OUTIL

A

esoaes

sinnodtentcivan

ten

utes

teene

>

90

dB

MOWING

PICO

occaczcctiaiesn

dain

iy

ontnaun

seit

cedures:

Sheotatsasisaece

Unmeasurable

(Quartz

Crystal

Accuracy)

OUTDUT

IMPCUANCS

eres

cctasictbcctaverscnivaratensysissadlenouss

120

2

Output

levelat0

OB

i

ckivavivestuicneareteuseaee

ee

iseecauttes

2.2

Vrms

Digital

Error

Comecton:

aceisisssoiveisn

ccptatsancepebeasesuacsbone

CIRC

with

double

error

correction

in

C1

and

C2

.

Digital:

Code

Output

sg.

ceceiendi

aces

ears

lissnvavenanasid

ealeemerana

Sony

/

Philips

serial

data

format

Remote

Controvu

nit

a

sesssceiun

ea

dteepeniaiionctansteeaes

Yes

CONTROLS

Random,

Play

/

Pause,

Stop,

Skip

(<

>),

Scan

(<

>),

Program,

Time,

Repeat.

PHYSICAL

SPECIFICATIONS

Dimensions

435

x

93

x

295

(mm)

(Width

x

Height

x

Depth)

Net

weight

4.4

kg

(9.7

Ibs)

Shipping

weight

5.6

kg

(12.35

Ibs)

REAR

PANEL

/

FRONT

PANEL

VIEW

REAR

PANEL

1.

LINE

OUTPUT

2.

NAD

LINK

IN

/

OUT

FRONT

PANEL

LON

Ole

Oh

Compact

Disc

Player

512

POWER

ON

/

OFF

DISC

DRAWER

OPEN

PLAY

/

PAUSE

STOP

DISPLAY

TIME

3.

DIGITAL

OUTPUT

4,

AC

LINE

CORD

10:

12.

13.

14.

PROGRAM

REPEAT

SKIP

Back

(<<

)

.

SKIP

Forward

(

BP

)

SCAN

Back

(

<<

)

SCAN

Forward

(

>

)

RANDOM

©

1995

NAD

ELECTRONICS

LTD.

512

©

1995

NAD

ELECTRONICS

LTD.

512

BLOCK

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ERUSAREE

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PI05B_<SCAN_

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>

DISASSEMBLY

INSTRUCTIONS

TOP

COVER

REMOVAL

1;

Remove

machine

screws

M

4.0

x

6.0

(@)

to

®

)

from

the

side

panels.

Remove

tapping

screw

3.0

x

8.0

©

from

the

back

panel.

Refer

to

figure

No.

1.

Figure

No.

1.

@)

2.

Pull

both

sides

of

the

TOP

COVER

slightly

outwards

and

tilt

approx.

35°

and

then

remove

in

the

direction

as

indicated

by

pointer

@)

in

figure

No.

2.

Figure

No.

2.

|

i

|

;

i

(

|

j

!

|

ADJUSTMENT

POINTS

DIAGRAM

©

P109

Z2—a

CI

<=

2®@

P104A

P102A

BLU

BLK

BLU

P503

P502

PS501

EOLAY

GAY

F501

T800mA/250V

C501

502

qgo7

4010

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g0sa

Sosa

€0d

NIVIN

Q502

Q501

NAD

-

512

PCB

ADJUSTMENT

POINTS

DIAGRAM

ALIGNMENT

PROCEDURE

REQUIRED

INSTRUMENTS:

SPECIAL

JIG

(SEE

FIG.

1),

OSCILLOSCOPE

(BANDWIDTH

GREATER

THAN

40

MHz)

FREQUENCY

COUNTER

AND

TEST

DISC

(SONY

YEDS-7).

Step

A:

PLL

Adjustment

(1)

Turn

power

ON

and

press

the

STOP

key.

(2)

Short

circuit

P108

(ASSY)

to

P107

(GND).

(3)

Connect

the

frequency

counter

to

P106

(CLK)

and

P107

(GND).

(4)

Adjust

RV101

for

a

reading

of

4.2318

+/-

0.01

MHz.

(5)

After

this

adjustment

is

completed

remove

the

short

circuit

between

P108

and

P107.

Step

B:

RF

Adjustment

(1)

Load

the

test

disc

and

set

the

unit

into

PLAY

mode.

(2)

Connect

the

scope

to

P109

(RF)

and

P107

(GND).

Scope

setting:

Coupling

:

AC.

Vertical

sensitivity

:

0.2

V/div.

Horizontal

time

base

:

0.5

uS/div.

(3)

Adjust

RV102

so

that

the

3T

component

of

the

waveform

is

maximum

and

the

eye

pattern

is

at

its

best

shape

(see

Fig.

2).

Step

C:

EF

Balance

adjustment

(1)

Turn

the

power

OFF,

remove

P111

and

replace

it

with

the

special

jig

shown

in

Fig.

1.

(2)

Connect

the

scope

as

shown

in

Fig.

1

and

switch

the

jig

to

the

"ON"

position.

Scope

setting:

Coupling

Z.DC.

Vertical

sensitivity

:

0.5

V/div.

Horizontal

time

base

:

2

mS/div.

(3)

Load

the

test

disc

and

put

the

unit

into

PLAY

mode.

(4)

Adjust

RV103

so

that

the

tracking

error

waveform

is

symmetrical

(see

Fig.

3).

NOTE:

BEFORE

CONTINUING

REFER

TO

PAGE

12

FOR

GUIDANCE

ON

FOCUS

AND

TRACKING

GAIN

ADJUSTMENT.

Step

D:

Focus

gain

adjustment

(1)

Put

the

unit

into

play

mode.

(2)

Switch

the

special

jig

to

"OFF"

and

leave

the

scope

connected.

(3)

Connect

Scope

setting:

Coupling

ca

BIG

Vertical

sensitivity

:

0.1

V/div.

Horizontal

time

base

:

2

mS/div.

(4)

Adjust

RV105

so

that

the

DC

level

is

between

120

and

200

mV.

(5)

Turn

the

power

OFF,

remove

the

jig

and

return

the

original

socket

to

P111.

Step

E:

Tracking

gain

adjustment

(1)

Turn

the

power

ON,

load

the

test

disc

and

press

PLAY.

(2)

Connect

the

scope

to

3

of

P111.

Scope

setting:

Coupling

:

DC.

Vertical

sensitivity

:

0.2

V/div.

Horizontal

time

base

:

2

mS/div.

(3)

Adjust

RV104

so

that

the

waveform

is

as

shown

in

Fig.

4(a).

FIG.

1

O

TO

SCOPE

FIG.

2

(a)

FIG.

2

(b)

Poor

eye

pattern

ST

4T

5T

-

11T

Yi

FIG.

2

(c)

Good

eye

pattern

FIG.

3

OV

Same

amplitude

FIG.

4

(a)

Good

waveform

Volt/div

:

0.2V

Time/div

:

2ms

NNR

FIG.

4

(b)

High

tracking

gain

(higher

frequency

than

for

low

gain)

ae”

Volt/div_:

0.2V

Time/div

:

2mS

OV

FIG.

4

(c)

Low

tracking

gain

Volt/div

:

O2V

)

Time/div:

2msS

OV

11

GUIDANCE

ON

FOCUS

AND

TRACKING

GAIN

ADJUSTMENT

NOTE:

It

is

recommended

that

this

adjustment

is

not

carried

out

unless

absolutely

necessary.

A

frequency

response

analyzer

is

necessary

to

carry

out

this

adjustment

precisely.

However

this

adjustment

has

a

wide

tolerance

so

that

even

if

the

adjustment

has

not

been

performed

exactly

the

player

will

still

work

with

an

acceptable

level

of

performance.

The

focus

and

tracking

gain

determine

not

only

the

vertical

and

horizontal

tracking

characteristics,

but

also

the

amount

of

mechanical

noise

from

the

optical

blocks

two

axis

device

and

its

sensitivity

to

mechanical

shock.

Correct

adjustment

will

be

at

the

point

where

all

the

above

criteria

are

satisfied.

*

When

the

gain

is

too

high,

the

mechanical

noise

is

high.

*

When

the

gain

is

too

low,

the

susceptibility

to

mechanical

shock

and

skipping

will

be

poor.

GAIN

SYMPTOM

Time

taken

from

stop

to

play

is

excessive,

or

track

skip

2

time

is

excessive.

(normally

approx.

2

sec)

low

or

high

low

or

high

Music

does

not

start

when

play

is

pressed

or

track

selec-

tion

is

made

but

disc

rotates.

[oomeasertemmannan

pena

|

aeminsonamemeenem

||

12

IMPORTANT

NOTES

INSTRUCTION

FOR

HANDLING

OPTICAL

SYSTEM

BLOCK

PICK-UP

Electrostatic

breakdown

of

the

laser

diode

in

the

optical

system

block

may

occur

due

to

a

potential

difference

caused

by

electrostatic

charge

accumulated

on

clothing,

human

body,

etc.

A

ground

must

be

provided

as

follows

to

prevent

any

electrostatic

charge

during

unpacking

or

repair

work.

1.

Ground

for

Human

Body

Be

sure

to

wear

a

ground

band

(1M

ohm)

that

is

properly

grounded

to

remove

any

static

electricity

that

may

be

charged

on

the

body.

2.

Ground

for

Work

Bench

Be

sure

to

place

a

conductive

sheet

(1M

ohm)

or

copper

plate

with

proper

grounding

on

the

work

bench

or

other

surface

on

which

the

pick-up

is

to

be

placed.

3.

Because

the

static

electricity

charge

on

the

clothing

does

not

discharge

through

the

body

grounding

band,

do

not

let

clothing

to

get

in

contact

with

the

pick-up

unit.

INCORRECT

;

CORRECT

1.

Grounding

band

By

EN

won

&

NOTE:

Laser

diodes

are

so

susceptible

to

damage

from

static

electricity

that

even

if

a

static

discharge

does

not

ruin

the

diode,

it

can

shorten

its

life

or

cause

it

to

work

improperly.

1M

ohm

2.

Conductive

Sheet

or

Copper

Plate

PRECAUTIONS

FOR

CHECKING

BEAM

EMISSION

The

laser

beam

of

this

unit

is

focused

on

the

reflecting

surface

of

the

objective

lens

in

the

optical

system

block.

Therefore,

keep

your

eyes

at

least

12

inches

(30

cm)

away

from

the

objective

lens

when

the

laser

diode

is

ON.

(Operation

Check

Method

for

Laser

Diode

and

Focus

Search

Function.)

When

the

POWER

switch

is

turned

ON

after

the

chucking

plate

is

removed,

observe

the

objective

lens

and

confirm

that

the

following

operations

are

performed

properly.

(The

optical

system

block

should

be

at

the

lead-in

area

position

when

it

is

checked

at

this

time.)

(1)

The

laser

should

be

at

the

innermost

position

after

the

checking

place

is

removed.

(2)

The

diffused

light

of

the

laser

beam

can

be

seen

when

the

POWER

switch

is

turned

ON.

(3)

Vertical

(up

and

down)

movement

of

the

objective

lens

(2

or

3

times)

will

take

place.

13

PRECAUTIONS

WHEN

CHANGING

LASER

PICK-UP

When

removing

the

pick-up

assembly,

short

circuit

the

PCB

tracks

on

the

optical

block

as

shown

in

the

drawing

in

order

to

protect

the

pick-up

before

removal.

NOTE:

Replacement

pickup

assemblies

are

supplied

with

the

PCB

pattern

already

protected.

DO

NOT

REMOVE

THE

SHORT

CIRCUITS

UNTIL

YOU

HAVE

FINISHED

FITTING

THE

PICK-

UP:

Caution:

Laser

diodes

are

extremely

susceptible

to

damage

from

static

eletricity.

Even

if

a

static

discharge

does

not

ruin

the

diode,

it

can

shorten

its

life

or

cause

it

to

work

improperly.

When

replacing

the

pick-up,

use

a

conductive

mat,

a

grounded

soldering

iron,

and

so

on,

to

protect

the

laser

diode

from

static

damage.

Ground

Conductive

Wrist

Band

for

Body

Soldering

lron

with

Ground

Line

wire

Less

than

10

ohm

Conductive

Gum

Mat

14

ANTYd

LNSNOdWOS

Wd

AN

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PCB

LAYOUT

(PARTS

SIDE)

igs

a

O

AZ

TSGUN

eatin

=i

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é

Nad

15

P104A=-P4.02A

-t=-8

<=

P43A

CAUTION:

16

SOR“

FRT

FOR

CONTINUED

PROTECTION

AGAINST

RISK

OF

FIRE,

REPLACE

ONLY

WITH

SAME

a+

SCHEMATIC

DIAGRAM

:

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MN6471/4

MASH

Q103

CXD-11670

DIGITAL

SIGNAL

PROCESSOR

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NOTE:

1.

Resistors

marked

with

"*"

are

1/8

Watt.

acca

on,

Bere)

ey

2.

Resistors,

unless

otherwise

specified,

are

1/4

Watt.

:

O2

.

ge

4

+36

ap

Sous

ip

88O119

3.

Capacitors,

unless

otherwise

specified,

are

50

V.

Eee

Ficuo4

Bor

ECB

Beaiole

BCE

P

28B909M

28C2878

—=«-2SB1375

4.

Marked

with

"A\"

are

safety

critical

part.

2SD1225M

2SB1013

2802012

17

18

5

ro"

6

1

ICU04

IC

BLOCK

DIAGRAM

Q101:

CXA1081M

Q103:

CXD1167Q

Current

Reference

(®)

SCOR

Subcode

Q

Subcode

Demodulator

Register

Sync

Detector

(27)

EFM

23-bit

PDO

EFM

Demodulator

(26)

ASY

Shift

Register

Error

detector

/corrector

CLV

Servo

Control

sync

detector/

protector/inserter

MIRROR

MOS

HOLD

AMP

MIRROR

vCcO

circuit

interpolator

68)

SLOB

timing

generator

22)

MIRR

DerecT

ie.

(21)

DEFECT

BOTTOM

HOLD

-

CE

reCr

XTAO

A

:

a

OL

TRACKING

FOCUS

ERROR

iil

(18)

FE

BIAS

CNIN

(17)

CENTER

VOLTAGE

BUFFER

(17)

Vee

X'TAL

circuit

Digital

Filter

timing

generotor

Trocking

counter

CPU

interface

(16)

cc}

19

20

|

poSnnrae

it

een

eating

)

Q102:

CXA1082BQ

12

DATA

REGISTER

INPUT

SHIFT

REGISTER

ADDRESS

-

DECODER

SEQUENCER

OUTPUT

DECODER

FS1to4

TGito2

TMito7

PS1ito3

sect?

»

Q105:

MN6471M

/MN6474M

TEST!

rest2

Tez

try

“IAN

3a4FS

1926S

LACLK

G4)

rs

i<j

BCLK

G5)

¥

Zz

SAOATA

Q5)

8

a

21

ANALOG

BLOCK

(R}

8x

AQ

a

<zOu4

za.

za

(1)

OUTRI-}

(18)

OUTR(+

(14)

oUTL

(4)

(11)

ouTLt~}

TROUBLESHOOTING

GUIDE

SET

POWER

SWITCH

TO

ON

NO

1S

POWER

TURNED

ON

?

YES

NO

CAN

TRAY

BE

OPENED

?

CAN

TRAY

BE

CLOSED

?

YES

DOES

INITIAL

READING

OCCUR

?

YES

NO

CAN

DISC

BE

PLAYED

?

YES

AUDIO

OUTPUT

IS

CORRECT

?

YES

CHECK

FUSE

F501,

F502

OPEN

?

YES

F501

OR

F502

DEFECTIVE

IS

THERE

OPEN/

CLOSE

KEY

SIGNAL

INPUT

?

Q104

13

YES.

CHECK

OPEN/

CLOSE

SIGNAL

AT

IC104,

a

ee

[taaycuose

[ok

[|

YES

IS

LOADING

MOTOR

DRIVE

CIRCUIT

OPERATION

NORMAL

?

Q507

9

YES

LOADING

MOTOR

AND

LEAD

WIRE

DEFECTIVE

OR

LOADING

PART

OF

MECHANISM

DEFECTIVE.

NO

CHECK

LASER

LIGHT

?

NO

CHECK

POWER

SUPPLY

NO

CIRCUIT

NORMAL

?

YES

NO

iS

OSCILLATOR

CIRCUIT

OSCILLATING

?

$701

SWITCH,

D704

DIODE

DEFECTIVE

OR

PATTERN

AND

CONNECTOR

OPEN

MICROPROCESSOR

IC

Q104

DEFECTIVE.

MOTOR

DRIVE

IC

Q507

DEFECTIVE.

YES YES

CHECK

LASER

CIRCUIT

CORRECT

?

RF

SIGNAL

OUTPUT

?

YES YES

CONNECTING

OR

PICKUP

DEFECTIVE.

FEED

MOTOR

OR

WIRING

DEFECTIVE

NO

Q101

OR

Q110

DEFECTIVE

NO

CHECK

TRACKING

SERVO

CIRCUIT

CORRECT

?

YES

CHECK

DISC

OR

MECHANISM

AND

CONNECTOR

NO

tS

POWER

SUPPLY

NORMALLY

?

YES

CHECK

OUTPUT

PULSE

AT

76,78,80

OF

0103

IC

Q103

DEFECTIVE.

IC

Q201

OR

Q202

DEFECTIVE.

CHECK

OUTPUT

SIGNAL

AT

1.7

OF

0201,

Q2G2

YES

NO

CHECK

OUTPUT

SIGNAL

AT

1.7

OF

Q203,

Q204

YES

CHECK

MUTE

CIRCUIT

Q207, Q208,

0209,

0210

YES

LINE

OUT

PLUG

OR

PATTERNS

DEFECTIVE,

DOES

LENS

MOVE

UP

AND

DOWN

?

NO

CHECK

POWER

SUPPLY

PATTERNS.

IC

Q203

OR

0204

DEFECTIVE.

MUTE

CIRCUIT

DEFECTIVE.

POWER

SUPPLY

PATTERNS

OPEN

OR

Q503,

Q504,

Q505

DEFECTIVE

CRYSTAL

2201

DEFECTIVE,

Q101

DEFECTIVE

NO

CHECK

FOCUS

SIGNAL

OUTPUT

?

YES

CHECK

CONNECTING

OR

PICKUP

SERVO

IC

Q102

OR

DRIVE

TRANS,

Q604-Q607

DEFECTIVE.

YES

CHECK

OUTPUT

PULSE

AT

11,14,18,21

OF

Q105

IC

Q103

DEFECTIVE,

YES

EXPLODED

VIEW

cn

ne

emma

cc

eS

ote

eae

nce

nie

ne

ptt

enine

tener

tne

eR

tL

a

ea

tant

eee

ee

ae

eet

ny

ae

e

[

)

|

a

‘i

23

EXPLODED

VIEW

PARTS

LIST

ITEM

PART

NO.

DESCRIPTION

QTY

0001

2842-3367-0

METAL

WASHER

ID=3.3

OD=6.7

4

0002

2904-3008-0000

M3

X

8

MM

BINDING

HEAD

(YEL.ZN)

4

0003

4111-0401-0

CD

SONY

KSL-2101ABM

1

0004

4152-0801-0

RUBBER

CUSHION

4

0005

5400-0981

-0

HEAT

SINK

SMALL

1

0006

5400-0991-0

HEAT

SINK

LARGE

1

0007

2900-4006-3010

M4

X

0.5P

X

6

MM

W/FLAT

WASHER

4

0008

N14023770-0

TOP

COVER

1

0009

N14023780-0

STRAP

1

0010

N14629411-0

FASCIA

(512)

W/SS

1

0011

N14629511-0

DOOR

CD

(512)

1

0012

N14629601-0

BUTTON

EXTENSION

1

0013

N14629701-0

BUTTON

SET

2

0014

N1462980B-0

LIGHT

BOX

LCD

1

0015

N14629901-0

MAIN

BUTTON

SET

1

0016

N2437510B-0

DIA

9.5

GLOSS

POWER

BUTTON

ABS

GN

1

0017

N3714590B-0

LIGHT

BOX

FILTER

(LF

NO.217)

1

0018

A

N41519461-0

STRAIN

RELIEF

BUSHING

1

0019*AH

A

N70093100-1

AC

CORD

18AWG

x

2

SPT-2UL/CSA

1

0019°C

A

N70093110-1

AC

CORD

(SEMKO)

1

0019*B

A

N70095110-1

AC

CORD

ASTA

BS1363

W/38A

FUSE

1

0019*B1

A

N70091190-0

AC

CORD

SAA

AS3112

(AUS/NZ)

l

0020*AH

N14023761-0

CHASSIS

W/SS

.

1

0020*B,B1,C

1402-3763-0

CHASSIS

W/"

CE

"

MARKING

1

0101

N37146011-0

DISPLAY

WINDOW

W/SS

1

0180

3714-650B-0

LIGHT

BOX

FILTER

(LF

NO.202)

3

0181

3714-6606-0

LIGHT

BOX

FILTER

(CLEAR)

1

0190

4132-2671-0

STUD

M3

4

0280

2964-2308-0000

SCREW

2.3

X

8

B/H

TAPPING

YEL

ZN

2

0320

2950-2005-0000

SCREW-ST

PH

2X5

2

0321

2900-4006-3010

M4

X

0.5P

X

6

MM

W/FLAT

WASHER

2

0322

2954-3008-0000

TAPPING

3

X

8

MM

B-TITE

(YEL.ZN)

14

0323

2954-3008-3000

TAPPING

3

X

8

MM

B-TITE

(BLK.ZN)

12

0324

2904-3008-0000

M3

X

8

MM

BINDING

HEAD

(YEL.ZN)

2

0402

A

4152-1001-0

PSU-PCB

COVER

PLATE

1

0405

N4151937-1

RUBBER

FOOT

4

24

NAD Classic 512 User manual

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